Feed mechanism for drill-spindles.



No. 825,273. PATENTED JULY 3, 1906.

4 R.G.HENRY. FEED MECHANISM FOR DRILL SPINDLBS.

APPLICATION FILED SEPT. 29. 1905.

Wizfizessea. fzza zzcoz W W @i 8. MW J W 5% a,

. C. THE NuRnls PETERS co., wAsHma'mN, n

UNITED STATES PAT ENT OFFICE.

ROBERT C. HENRY, OF HARTFORD. CONNECTICUT, AS SIGNOR TO THE HENRY &WRIGHT COBIPANY, OF HARTFORD, CONNECTICUT, A COR- PORATION OFCONNECTICUT.

Specification of Letters Patent.

Patented July 3, 1906.

Application filed September 29, 1905. Serial No. 280.583.

T0 (0Z7 whom it ntay concern:

Be it known that I, ROBERT G. HENRY, a citizen of the United States,residing at Hartford, in the county of Hartford and State ofConnecticut, have invented a new and useful Feed Mechanism forDrill-Spindles, of which the following is a specification.

This invention relates to the mechanism which is grasped by the hand ofthe operative and turned for feeding the spindles of a sensitive drill.and while it is particularly de signed for and adapted to the feedmechanism of multiple-spindle drills it is applicable tlo ghe feedmechanism of a single-spindle C rn In multiple-spindle drill-presses theseveral spindles of necessity stand comparatively close together, sothat the means employed for feeding the spindles must be compact toavoid inteiference, and the spindles are supported but a little outfromthe standard or back frame, so that the length of the operatinghandle-bars which are rotated for feeding spindles is limited. It hasbeen common to clamp the handle-bars in the pinion-hubs of machines ofthis character by means of setscrews, so that when the screws wereloosened the bars could be drawn out for increasing the leverage orpushed in, so that the pinionhubs could be rotated. The manipulation ofset-screws requires the use of both hands of the operative and takestime, and set-screws are not neat in appearance. They collect oil,chips, and lint, and they project so as to prevent free access of thehand about the spindles.

The object of this invention is to provide a simple, convenient,durable, and neat arrangement whereby the handle-bars which are graspedby the operative for moving the spindles may be quickly adjusted by onehand, so as to increase their leverage when the spindles are being fedtoward the work, and shortened, so that they may be readily rotatedwithout engaging the standard when the spindles are being returned.

Figure 1 of the accompanying drawings represents three spindles of amultiple-spindle drill-press provided with feed mechanism that embodythis invention. Fig. 2 shows, on larger scale, one of the feed-spindlemechanisms with part broken away in order to expose the interior. Fig. 3shows a view of the outer end of the feedpinion hub.

The spindles 1 that are represented in the drawings are of ordinaryconstruction and are held by feed-sleeves 2, that are supported bybrackets 3 in the usual manner. As is common is this class of machines,the spindles rotate freely in and are carried up and down by thenon-rotatable feed-sleeves, that are provided with racks 4, which areengaged by pinions 5, cut on the inner ends of hubs 6, as usual.

Each pinion-hub is perforated transversely near its outer end, andloosely extending through this perforation is a handle-bar 7. In asocket that extends longitudinally inward from the outer end of eachpinion-hub is a plunger 8, that is thrust outwardly by a spring 9, sothat its head impinges against the side of the handle-bar.

Each handle-bar is temporarily held by the friction of thespring-plunger in whatever position it is drawn to. In order to lengthenone side of the handle-bar, so as to increase the leverage andfacilitate the feeding of a drill into stock, it is only necessary tograsp --the bar and draw it out the desired distance. To return thehandle, so that the hub may be rotated for lifting the drill from thestock, it is only necessary to push back the bar, so that it will besupported centrally by the hub. These movements are accomplished quicklyby one hand, leaving the other hand of the operative free for holdingthe stock which is being drilled or for other purposes. Manipulating aset-screw for these purposes requires the use of two hands and takesmore time, besides a set-screw projects toward the adjacent spindle insuch manner as to obstruct free access of the hand of the operative whenit is necessary for him to pass his hand between the spindles.

The invention claimed is A feed mechanism for drill-spindles having arotatable feed-pinion, a hub extending outwardly from the pinion, saidhub having a transverse perforation near its outer end and l socket andthe plunger on the inside of the a lgngitudirllalljocket exktendingfromits outer handle-bar, substantially as specified. en inward e ond t eerforation, a hendle-bar exteiidin g througli the perforation, a ROBERTHENRY I WVitnesses 1 HARRY R. WViLLrAus, FLORENCE E. FALLow.

plunger inox able in the socket inside of and bearing against the bar,and a spring in the socket thrusting between the inner end of the

